How to Invoke a Wpf Windows in a dll Class Library

Question

Hello, I have added a Wpf window to a class library, now the problem is how to call it from a different project.

Answer 1

Hi, @Marino Liranzo . Welcome Microsoft Q&A.

Is your class library Class Library (.NET Framework), Class Library or WPF Class Library? If it is WPF Class Library, you can refer to the following code. If there is any problem, please let me know.

My Target Framework are both .NET 6.0.

project structure:

You could right-click Denpencies under WPF Project (InvokeLibrary) and select Add Project References..., then Check WPF Class Library (WpfLibrary1).

You can directly use the window in the class library in the wpf project.

MainWindow.xaml:

 <Grid>
        <Button x:Name="btn" Content="show window1" Height="50" Click="btn_Click" />
    </Grid>

MainWindow.xaml.cs:

  private void btn_Click(object sender, RoutedEventArgs e)
        {
            Window1 w = new Window1();
            w.Show();
        }

The result:

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